I'm pretty sure the 997S was 8:06 and the C4S with 8:02, whether these figures were by Walter or SportAuto I don't know but I can't recall seeing the 997 posting a time of 7:59.
As for the M3 DCT, logic says a time of 8:00 dead sounds about right. If it's no improvement over the manual then it will prove that the gearbox has not be setup for proper track work, which would be understandable considering it's been design for a everyday car (admittedly a very quick one at that).
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